Coating-machine.



L. W. SUIHERLMID.

COATING MACHHVE.

APPLICATION FILED MAY 2, 1918.

Patented Aug. 20,1918

2 SHEETS-SHEET I.

L. W. SUTHERLAND'.

COATING MACHINE.

APPLICATION man MAY 2. 1918.

Patented Aug. 20, 1918.

2 SHEETSSHEET 2.

oh \N 51mm LOU/6 m .50 THERUWD LOUIS W. SUTHERLAND, 0F KALAMAZOO,MICHIGAN, ASSIGNOR TO KALAMAZOO CARTON COMPANY, OF KALAMAZOO, MICHIGAN.

COATING-MACHINE.

Specification of Letters Patent.

Patented Aug. 20, 1918.

Application filed May 2, 1918. Serial No. 232,002.

To all whom it may concern:

Be it known that I, LOUIS W. SUTHER- LAND, a citizen of the UnitedStates, residing at the city and county of Kalamazoo and State ofMichigan, have invented certain new and useful Improvements in Coating-Machines, of which the following is a specification.

This invention relates to improvements in coatin machines. I

My improvements are especially designed by me and I have illustrated thesame as I have embodied and used them for the coating of cartons withparaffin, although my improvements are applicable for use in applyingother liquid to sheets.

The main objects of this invention are.

First, to provide an improved coating machine by means of which sheetsmay be rapidly and evenly coated on both sides and at the same time onewhich is economical in the material consumed. v

Second, to provide an improved coating machine of large capacity.

Third, to provide an improved coating machine which is simple in itsstructure and operation.

Further objects, and ob'ects relating to structural details, willefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. The invention is clearlydefined and ointed out in the claims.

A structure whic is a preferred embodiment of my invention is clearlyillustrated in the accompanying drawing forming a part of thisspecification, in which:

Figure I is a side elevation of a coating machine embodying the featuresof my in-- vention.

Fig. II is a detail plan view thereof.

Fig. III is a vertical central longitudinal section.

Fig. IV is a detail side elevation show ng the driving connections forthe coating rollers.

Fig. V is a detail elevation showing the driving connections for a pairof coacting rollers.

Fig. VI is a detail of one of the felt covered rollers.

In the drawing similar reference characters refer to similar partsthroughout the several views.

Referring to the drawing, I provide a stock or work supporting table 1at the front of the machine. At the rear of this is a tank 2 supportedby the frame 3. The tank 1s comparatively shallow and adapted to containliquid paraffin or other coating material. The parafiin is kept in afluid state by the heating pipes 4.. The supply tank 5 is arranged atone side of the tank and provided with a faucet 5' delivering 66 theretoso that the coating material may be kept at approximately the desiredlevel.

I provide pairs of coacting rollers 6 and 7 These rollers are supportedby blockhke bearing members 8 in the frames 9 mounted at the sides ofthe tank. The screws 10 are provided for adjusting the pressure of therollers. The rollers are felt covered and are disposed so that the upperrollers of each pair are entirely above the surface of the liquid andthe lower dip into the liquid, the points of contact of the rollersbeing substantially above the surface of the liquid so that the coatingliquid is supplied to the upper rollers only through their contact withthe lower.

The pairs of rollers are connected by the gears 11, see Fig. V. Thelower rollers are connectedby the sprocket chain 12 and the sprocketwheels 13 on the roller shafts, see Fig. IV. A housing 14 is providedfor the sprockets and sprocket chains. One of the rollers is providedwith a pulley 15 connected by the belt 16 to a countershaft or othersource of power.

The rear pair of rollers are positioned at the rear of the tank so as todeliver the sheets to the cooling tank 17 in which I preferably usewater where the sheets are to be coated with paraflin.

Between the pairs of rollers I provide a grid-like frame formed oflongitudinally spaced guide bars 18 mounted on the rods 19. These barsare arranged so that the sheets passing from the front pair of roll- 100ers are supported and guided through the rear pair of rollers, the guidebars being located well above the surfaceof the liquid. Longitudinallyspaced feed guide bars 20 similar to the'bars 18 are disposed in frontof the front pair of rollers to guide the stock thereto. These bars aresupported on rods 21 similar to the rods 19. These guide bars permit theexcess liquid to flow freely from the rollers into the tank.

Slat-like slides 22 extend from the front end of the table to the bars20 so that the sheets 23 may be slid along by the operator on theseslides 22 -to the bars 20 which guide them to the rollers. in Contactthe paraffin or other coating is distributed by the lower rollers to theupper rollers so that when a sheet is passed between the rollers it iscoated on both sides, the sheets being fed at such intervals as permitsthe upper rollers becoming properly coated or charged with thecoatingmaterial. As the rollers are driven quite rapidly the interval inpractice is about such as an operator requires in successively feedingthe sheets.

To carry the sheets well into the cooling liquid, which is preferablywater, I provide a series of pairs of coacting feed belts 24 and 25.These feed belts are supported at their .front ends by rollers 26' and27 and at their rear ends by the rollers 28 and 29 respectively. Bothreaches of the belts pass below the guide roller 30. The lower reachesof the belts also pass below this guide roller 30 which is located wellbelow the surface of the water so that the sheets are carried into andthrough the water by the belts. Guides 31 are positioned at the rear ofthe rear pair of coating rollers to deliver to the feed belts.

The sheets are discharged from the feed belts between the squeezingrollers 32 which are designed to squeeze the water or the main portionthereof from the sheets. These rollers are driven by the belt 33 andpulley 34 so that they also act as discharge rollers discharging thesheets to the rack 35.

The series of belts 24 and 25 are driven from the belt and pulley 37 onthe shaft of the roller 28. \Vith this arrangement of parts the sheetsare evenly coated and this without immersing the same in the paraflin.

The application of the coating by means of the rollers prevents theformation of any lumps, bubbles or unevenness on the sheets and providesa continuous and even though thin coating.

Having thus described my invention, what I claim as new and desire 'tosecure by Letters Patent is 1. In a coating machine, the combination ofa tank provided with heating means, a

The rollers being feed table disposed in front of said tank, pairs offelt covered rollers disposed so that the upper portions of the lowerrollers are substantially above the surface of the liquid and theirlower portions dip into the liquid in the tank, the lower pair ofrollers beinri disposed at the rear of the tank to deli er the stock,pressure adjusting means for the upper rollers, longitudinal spacedguide bars disposed above the surface of the liquid between the pairs ofrollers for guiding the stock from the front pair to the rear pair, andlongitudinal spaced feed-bars disposed above the surface of the liquidin front of the first pair of rollers to support and guide the stockfrom the table thereto, and driving means for said rollers.

2. In 'a coating machine, the combination ofa tank, pairs of feltcovered rollers disposed so that the upper portions of the lower rollersare substantially above the surface of the liquid and their lowerportions dip into the liquid in the tank, pressure adjusting means forthe upper rollers, longi-- tudinal spaced guide bars disposed above thesurface of the liquid between the pairs of rollers for guiding the stockfrom the front pair to the rear pair, and longitudinal spaced feed barsdisposed above the surface of the liquid in front of the first pair ofrollers to guide the stock thereto, and

driving means for said rollers.

3. In a coating machine, the combination of a tank, a feed tabledisposed in front of said tank, pairs of rollers disposed so that theupper rollers are entirely above the surface of the liquid and the lowerroller of each pair dips into the liquid in the tank, the points ofcontact of the rollers being a substantial distance above the surface ofthe liquid so that the coating material is applied to the upper rollersonly through their contact with the lower, pressure adjusting means forsaid rollers, longitudinal spaced guide bars disposed above the surfaceof the liquid between the pairs of rollers for guiding the stock fromthe front pair to the rear pair, and longitudinal spaced feed barsdisposed above the surface of the liquid in front of the first pair ofrollers to support and guide the stock from the table thereto, anddriving means for said rollers.

4. In a coating machine, the combination of a tank, pairs of rollersdisposed so that the upper rollers are entirely above the surface of theliquid and the lower roller of each pair dips into the liquid in thetank, the points of contact of the rollers being a substantial distanceabove the surface of the liquid so that the coating material is appliedto the upper rollers only through their contact with the lower,longitudinal spaced guide bars disposed above the surface of the liquidbetween the pairs of rollers for guiding the stock from the front myhand and seal in the presence of two pair to the rear pair, andlongitudinal witnesses. spaced feed bars dis osed above the surface ofthe liquid in ront of the first pair 5 of rollers to guide the stockthereto, and Witnesses:

driving means for said rollers. LUELLA G. GREENFIELD,

In witness whereof I have hereunto set MARGARET L. GLASGOW.

LOUIS W. SUTHERLAND. [L- 8.]

